The Box Hill is situated in Surrey. This climb belongs to the North Downs.
Starting from Bottom of Zig Zag,
the Box Hill ascent is 2.51 km long. Over this distance, you climb 125 heightmeters.
The average percentage thus is 4.9 %.

Good fun climb - nice start and finish which makes it easy to time yourself. Probably the best climb within 15miles of London and the hairpins make it easy to pretend that it''s the Alpe d''Huez - even if it is only 2.8km at 5%...